The George Lucas episode of 'The Prophets of Science Fiction' is premiering as i'm typing. Missed the first 15 minutes. But when they aired a clip of Star Wars, I believe they've notated it as 1997.
*EDIT* SW is definitely labeled 1997. ...but Empire clips are labeled 1980....
The show is about how works from books to movies spur real world science. Episodes tend to showcase two of three technologies, along with a brief history of the author/creator and overview of the books/movies.